Linux (CentOS) installation jdk (. tar.gz) and configure

The idea of this article turns from http://blog.sina.com.cn/s/blog_81631744010137iy.html

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1. 1, to Oracle (Oracle) Download the JDK not much to say
2. Tar zxvf ****.tar.gz (****.tar.gz is the downloaded file name, unzip. )
3. MV * * * * JDK (* * * is your extracted folder, change the name, I changed to JDK, love change what, I change this good to remember)
4. MV jdk/usr/local/(then put the renamed folder to/usr/local/)
5. Vi/etc/profile (edit config, environment variable bar)
6. Last side join:
7. Java_home=/usr/local/jdk
8. Export JRE_HOME=/USR/LOCAL/JDK/JRE
9. Export classpath=.: $JAVA _home/lib: $JRE _home/lib: $CLASSPATH
10. Export path= $JAVA _home/bin: $JRE _home/bin: $PATH
11. Then modify the default JDK:
12. Update-alternatives--install/usr/bin/java Java/usr/java/bin/java 300
13. Update-alternatives--install/usr/bin/javac Javac/usr/java/bin/javac 300
14. Update-alternatives--config Java
15. Update-alternatives--config Javac
16. Finally see the success?
17. Java-version
18. Javac-version

Linux (CentOS) installation jdk (. tar.gz) and configure